Home / 3,938.41-5,434.81-2,169.68

Finding the Fourth Proportional to 3,938.41, 5,434.81 and 2,169.68

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Solution

The fourth proportional to 3,938.41, 5,434.81 and 2,169.68 is: 2,994.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.41 : 5,434.81 = 2,169.68 : x
  2. Step 2: Convert to fraction form
    3,938.41/5,434.81 = 2,169.68/x
  3. Step 3: Cross multiply
    3,938.41x = 5,434.81 × 2,169.68
  4. Step 4: Simplify right side
    3,938.41x = 11,791,806.72
  5. Step 5: Solve for x
    x = 11,791,806.72/3,938.41
  6. Step 6: Final answer
    x = 2,994.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.